CN211039225U

CN211039225U - Oil pressure device

Info

Publication number: CN211039225U
Application number: CN201921952588.5U
Authority: CN
Inventors: 刘兴波; 张晓东; 刘志伟; 綦晓丹
Original assignee: China Zhongwang Holdings Ltd
Current assignee: China Zhongwang Holdings Ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-07-17
Anticipated expiration: 2029-11-12

Abstract

The utility model relates to an oil pressure device, belonging to the technical field of hydraulic equipment, comprising a cylinder body, wherein a piston and a piston rod which reciprocate along the axial direction of the cylinder body are arranged in the cylinder body, and the piston is sleeved on the piston rod; the piston comprises an upper plug and a lower plug, and an intermediate buffer piece is arranged between the upper plug and the lower plug. This application has solved among the prior art because of the piston receives the fragile problem of strong impact through designing into the piston into the structure that has buffer function.

Description

Oil pressure device

Technical Field

The utility model belongs to the technical field of hydraulic equipment, a oil pressure unit is related to.

Background

In the working process of the existing hydraulic device, as a hydraulic rod in the device usually has a great impact effect on the device body and the sealing device in the working process, the service life of the hydraulic device is usually low, and particularly the sealing device needs to be frequently replaced. The hydraulic device requires frequent maintenance and component replacement, and therefore, the working efficiency is low.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the present application is to provide an oil pressure device, in which a piston is designed to have a buffering function, so as to solve the problem that the piston is easily damaged due to strong impact in the prior art, reduce the frequency of maintaining and replacing the piston, and improve the working efficiency of the hydraulic device.

In order to achieve the above purpose, the utility model provides a following technical scheme:

an oil pressure device comprises a cylinder body, wherein a piston and a piston rod which reciprocate along the axial direction of the cylinder body are arranged in the cylinder body, and the piston comprises an upper plug and a lower plug which are sleeved on the piston rod; an intermediate buffer piece is arranged between the upper plug and the lower plug.

Optionally, a first annular groove is formed between the upper plug and the lower plug, and the intermediate buffer is located in the first annular groove.

Optionally, the cylinder body comprises a cylinder body, and an upper cover plate and a lower cover plate which are detachably connected to two ends of the cylinder body, wherein an oil inlet cavity is defined by the upper plug, the upper cover plate and the cylinder body, and an oil outlet cavity is defined by the lower plug, the lower end cover and the cylinder body.

Optionally, the one end that the cylinder body is close to the upper cover plate is equipped with the bolster, it includes limiting plate and elastic component to go up the bolster, limiting plate fixed connection is on the cylinder body, the elastic component is located between limiting plate and the upper cover plate.

Optionally, a compression plate is further arranged between the limiting plate and the upper cover plate, the compression plate is provided with at least one guide hole parallel to the axis of the cylinder body, and the elastic member is located in the guide hole; one side of the upper plug, which faces the limiting plate, is provided with a plurality of first bulges, the limiting plate is provided with first convex avoiding holes, and the upper plug is in contact with the elastic piece through the first bulges.

Optionally, the elastic member includes a disc spring and a washer, the washer is located between the disc spring and the limiting plate, and the first protrusion passes through the guide hole and contacts with the washer.

Optionally, the output end of the piston rod passes through the lower cover plate and is connected with the lower cover plate in a sealing manner.

Optionally, a lower sealing plate is arranged at one end of the cylinder body close to the lower cover plate, and a lower buffer piece is arranged between the lower sealing plate and the piston rod; one side of the lower plug, which faces the lower sealing plate, is provided with a second protrusion, and the lower plug is in contact with the lower buffer piece through the second protrusion.

Optionally, an area of one end surface of the lower buffer facing the lower plug is larger than an area of the other end surface.

Optionally, a second annular groove and a third annular groove are respectively formed in the circumferential direction of the upper plug and the circumferential direction of the lower plug, and a second sealing ring and a third sealing ring which are connected with the cylinder body in a sealing manner are respectively arranged in the second annular groove and the third annular groove.

The beneficial effects of the utility model reside in that:

1. the utility model discloses be provided with middle bolster between last end cap and lower end cap, when receiving the impact, elastic deformation through middle bolster absorbs impact energy, can effectively reduce because of receiving the destruction that the impact received, has prolonged the life of piston.

2. The utility model provides a realize sealedly through inlaying piston ascending sealing member in week between piston and the cylinder body, this kind of seal structure can reduce the influence of fluid to the sealing member, improves the life of sealing member.

3. The utility model discloses set up the last bolster that has great deflection in oil inlet one side, go up the bolster and adopt the dish spring that has great deflection, the elastic deformation through the dish spring absorbs the impact force that brings because of the quick withdrawal of piston rod, can effectively reduce the violent impact that arouses because of the quick withdrawal of piston rod, has improved the life of piston.

4. The utility model discloses a bolster under oil-out one side sets up, the impact force that the piston received when not only can effectively reducing to reach extreme position because of the piston rod stretches out can improve the unstable phenomenon of piston motion that causes because of the piston rod output end receives external force suddenly moreover, has improved the stationarity of piston output end.

5. The utility model provides an go up end cap and lower end cap and pass through the step face restriction its axial position on the piston rod, have simple structure, spacing reliable advantage.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.

Drawings

For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic structural diagram of an oil pressure device according to the present invention.

Reference numerals: the oil-out structure comprises an upper cover plate 1, a compression plate 2, an oil inlet 3, an oil inlet cavity 4, an intermediate buffer member 5, a third sealing ring 6, a piston rod 7, an oil outlet 8, a lower cover plate 9, an output end 10, a lower sealing plate 11, a lower buffer member 12, a cylinder body 13, an oil outlet cavity 14, a lower plug 15, an upper plug 16, a second sealing ring 17, a limiting plate 18, a gasket 19 and a disc spring 20.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Referring to fig. 1, an oil pressure device includes a cylinder, a piston and a piston rod 7 disposed in the cylinder and reciprocating along the axial direction of the cylinder; the piston comprises an upper plug 16 and a lower plug 15 which are sleeved on the piston rod 7, an intermediate buffer member 5 is arranged between the upper plug 16 and the lower plug 15, the intermediate buffer member 5 is a buffer cushion, and the intermediate buffer member 5 is bonded with the upper joint and the lower joint.

Further, the intermediate cushion 5 is inserted into a first annular groove formed by the upper plug 16 and the lower plug 15.

Further, the intermediate buffer 5 can also be directly sleeved on the piston rod 7.

Further, the cylinder body comprises a cylinder body 13, an upper cover plate 1 and a lower cover plate 9 which are detachably connected to two ends of the cylinder body, an oil inlet cavity 4 is defined by an upper plug 16, the upper cover plate 1 and the cylinder body 13, and an oil outlet cavity 14 is defined by a lower plug 15, a lower end cover and the cylinder body 13.

Further, the cylinder body 13 is equipped with the upper cushion piece near the one end of upper cover plate 1, and the upper cushion piece includes limiting plate 18 and elastic component, and limiting plate 18 fixed connection is on cylinder body 13, and the elastic component is located between limiting plate 18 and upper cover plate 1.

Further, a compression plate 2 is arranged between the limiting plate 18 and the upper cover plate 1, the compression plate 2 is fixedly connected with the cylinder body 13, the compression plate 2 is provided with at least one guide hole parallel to the axis of the cylinder body 13, and the elastic element is positioned in the guide hole; one side of the upper plug 16 facing the limiting plate 18 is provided with a plurality of first protrusions, the limiting plate 18 is provided with avoidance holes of the first protrusions, and the upper plug 16 is in contact with the elastic piece through the first protrusions.

Further, the compression plate 2 has an axisymmetric structure.

Further, the elastic member includes a disc spring 20 and a washer between the disc spring 20 and the stopper plate 18, and the first protrusion passes through the guide hole to contact the washer.

Further, the piston rod 7 comprises a piston rod body and a piston connecting piece; the piston connecting piece is of a T-shaped structure; one end of the piston rod body is provided with a groove matched with the small end of the piston connecting piece, and the small end of the piston connecting piece is inserted into the groove of the piston rod body; the piston connecting piece is fixedly connected with the piston rod body; a fourth annular groove is formed between the piston rod body and the piston connecting piece, and the upper plug 16 and the lower plug 15 are embedded in the fourth annular groove.

Further, the small end of the piston rod 7 has a taper.

Further, one end of the cylinder body 13 close to the lower cover plate 9 is provided with a lower sealing plate 11, and a lower buffer 12 is arranged between the lower sealing plate 11 and the piston rod 7; the lower plug 15 has a second protrusion on a side facing the lower sealing plate 11, and the lower plug 15 contacts the lower buffer 12 through the second protrusion.

Further, the area of one end surface of the lower buffer 12 facing the lower plug is larger than that of the other end surface.

Further, the lower cushion 12 is tapered or stepped.

Further, the upper plug 16 has a second annular groove in the circumferential direction, and a second sealing ring 17 hermetically connected with the cylinder body 13 is disposed in the second annular groove.

Further, a third annular groove is formed in the circumferential direction of the lower plug 15, and a third sealing ring 6 which is connected with the cylinder body 13 in a sealing mode is arranged in the fourth annular groove.

The utility model discloses a concrete connection process as follows:

a cylinder body 13, an upper cover plate 1 and a lower cover plate 9 in the device are in threaded connection through bolts, an upper plug 16 and a lower plug 15 are sleeved on a piston rod 7, the piston drives the piston rod 7 to do reciprocating motion in the cylinder body, an oil inlet pipe is arranged on one side, close to the upper cover plate 1, of the cylinder body 13, an oil inlet 3 is arranged on the outer wall of the cylinder body 13 corresponding to the oil inlet pipe, the oil inlet 3 is communicated with the oil inlet pipe, a closed space formed by the piston, the cylinder body 13 and a limiting plate 18 is an oil inlet cavity 4, the oil inlet cavity 4 is communicated with the oil inlet pipe, and hydraulic oil is discharged into the oil inlet cavity 4 through the oil inlet pipe so as; the disc spring 20 is positioned in a guide hole on the compression plate 2, two ends of the disc spring 20 are respectively contacted with the upper cover plate 1 and the gasket 19, the limiting plate 18 is used for limiting the position of the piston movement, the limiting plate 18 is provided with a guide hole for the first bulge on the upper plug 16 to pass through, in the process of the piston moving upwards, the first bulge on the upper plug 16 is firstly contacted with the gasket 19 through the guide hole, the gasket 19 exerts pressure on the disc spring 20 and plays a role of buffering through the reaction force of the disc spring 20, the closed space formed by the piston, the cylinder body 13 and the lower sealing plate 11 is an oil outlet cavity 14, the outer wall of the lower sealing plate corresponding to the cylinder body 13 is provided with an oil outlet 8, sealing rings are respectively arranged between the lower sealing plate 11 and the piston rod 7 and between the piston and the cylinder body 13 to prevent the loss of oil in the sliding process, an intermediate buffer 5 is also arranged between the upper, the upper plug 16 and the lower plug 15 are used for preventing the service life of the upper plug 16 and the lower plug 15 from being influenced by severe impact. The end part of the second bulge on the lower plug 15 is arc-shaped, so that the impact on the sealing ring in the operation process is mainly reduced.

The utility model provides an go up end cap 16 and lower end cap 15 through the step face restriction its axial position on the piston rod 7, have simple structure, spacing reliable advantage.

The utility model discloses be provided with middle bolster 5 between last end cap 16 and lower end cap 15, when receiving the impact, through middle bolster 5 elastic deformation absorption impact energy, can effectively reduce the piston because of receiving the destruction that the impact received, prolonged the life of piston.

The utility model discloses a realize sealedly through inlaying piston ascending sealing member in week between piston and the cylinder body 13, this kind of seal structure can reduce the influence of fluid to the sealing member, improves the life of sealing member.

The utility model discloses set up the last bolster that has great deflection in 3 one sides of oil inlet, go up the bolster and adopt the dish spring 20 that has great deflection, the impact force that brings because of the quick withdrawal of piston rod 7 is absorbed through the elastic deformation of dish spring 20, can effectively reduce the violent impact that arouses because of the quick withdrawal of piston rod 7, has improved the life of piston.

The utility model discloses a bolster 12 under 8 one sides of oil-out set up, not only can effectively reduce the impact force that the piston received when stretching out to extreme position because of piston rod 7, can improve the unstable phenomenon of piston motion that arouses because of piston rod 7 output 10 receives external force suddenly moreover, improved piston output 10's stationarity. When the output end 10 of the piston rod 7 suddenly receives external force, the lower buffer piece 12 sleeved on the piston rod 7 can reduce the swing of the piston rod 7 caused by the influence of the external force, and further improve the stability of the piston motion.

The utility model discloses can effectively reduce oil pressure unit's maintenance work load, protect oil pressure equipment's inner structure, solve hydro-cylinder and sealing device because of receiving the problem that strong impact is easy bad.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. The utility model provides an oil pressure unit, includes the cylinder body, be provided with along cylinder body axial reciprocating motion's piston and piston rod in the cylinder body, its characterized in that: the piston comprises an upper plug and a lower plug which are sleeved on the piston rod; an intermediate buffer piece is arranged between the upper plug and the lower plug.

2. An oil pressure device according to claim 1, characterized in that: a first annular groove is formed between the upper plug and the lower plug, and the intermediate buffer piece is located in the first annular groove.

3. An oil pressure device according to claim 1, characterized in that: the cylinder body includes the cylinder body to and can dismantle upper cover plate and the lower apron of connection at its both ends, go up end cap, upper cover plate and cylinder body and enclose into the oil feed chamber, end cap, lower extreme cover and cylinder body enclose into out the oil pocket down.

4. An oil pressure device according to claim 3, characterized in that: the cylinder body is close to the one end of upper cover plate and is equipped with the bolster, it includes limiting plate and elastic component to go up the bolster, limiting plate fixed connection is on the cylinder body, the elastic component is located between limiting plate and the upper cover plate.

5. An oil pressure device according to claim 4, characterized in that: a compression plate is further arranged between the limiting plate and the upper cover plate, the compression plate is provided with at least one guide hole parallel to the axis of the cylinder body, and the elastic piece is located in the guide hole; one side of the upper plug, which faces the limiting plate, is provided with a plurality of first bulges, the limiting plate is provided with first convex avoiding holes, and the upper plug is in contact with the elastic piece through the first bulges.

6. An oil pressure device according to claim 5, characterized in that: the elastic piece comprises a disc spring and a gasket, the gasket is located between the disc spring and the limiting plate, and the first protrusion penetrates through the guide hole to be in contact with the gasket.

7. An oil pressure device according to claim 3, characterized in that: the output end of the piston rod penetrates through the lower cover plate and is connected with the lower cover plate in a sealing mode.

8. An oil pressure device according to claim 7, characterized in that: a lower sealing plate is arranged at one end of the cylinder body close to the lower cover plate, and a lower buffer piece is arranged between the lower sealing plate and the piston rod; one side of the lower plug, which faces the lower sealing plate, is provided with a second protrusion, and the lower plug is in contact with the lower buffer piece through the second protrusion.

9. The oil pressure device according to claim 8, characterized in that: the area of one end face, facing the lower plug, of the lower buffer piece is larger than that of the other end face.

10. An oil pressure device according to claim 3, characterized in that: and a second annular groove and a third annular groove are respectively formed in the circumferential directions of the upper plug and the lower plug, and a second sealing ring and a third sealing ring which are hermetically connected with the cylinder body are respectively arranged in the second annular groove and the third annular groove.